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Oliga [24]
3 years ago
7

How does a population experience variation in traits?

Biology
2 answers:
QveST [7]3 years ago
8 0

Answer:

b

Explanation:

Zanzabum3 years ago
6 0

Answer:

b

Explanation:

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A science researcher has developed a computer model of the process of DNA replication in a eukaryotic cell. The model includes t
wel

Answer:  Identify the promoter and the stop signal (terminator).

Explanation:

DNA is a molecule that contains the genetic information in all living things. This information is used for the synthesis of proteins that make up the body and carry out vital functions of the organism.

The DNA molecule consists of two strands that wind around each other to form a double helix structure, where each strand has a central part formed by sugars (deoxyribose in the case of DNA) and phosphate groups. The four basic components of DNA are nucleotides: adenine (A), thymine (T), guanine (G) and cytosine (C). The nucleotides are joined together (A to T and G to C) by chemical bonds and form base pairs that connect the two strands of DNA. Depending on the sequence of nucleotides (which have different bases), different proteins are synthesized.

<u>DNA replication consists of synthesizing another identical DNA molecule, using enzymes called polymerases, which are molecules specifically dedicated only to copy DNA. Transcription, on the other hand, is the process by which a copy of messenger RNA (mRNA) is generated from the sequence of a gene in the DNA. </u>This RNA molecule leaves the cell nucleus and enters the cytoplasm, where it directs protein synthesis (a polymer made up of many amino acids).

<u>Protein synthesis, or translation, involves translating the sequence of an mRNA molecule into an amino acid sequence during protein synthesis.</u> The genetic code describes the relationship between the sequence of base pairs in a gene and the corresponding sequence of amino acids it encodes. To begin translation, a start codon (set of 3 bases) must first be identified, which is usually AUG that also codes for the amino acid methionine. Then, the codons that follow are read and the corresponding amino acids are added according to the genetic code. The transfer RNA (tRNA) is complementary to the anticodon at specific codons in the messenger RNA and carries the amino acid coding for the codon. In addition, ribosomal RNA (rRNA) is an RNA that is part of ribosomes and is essential for protein synthesis in all living things. rRNAs form the framework of ribosomes and associate with specific proteins to form ribosomal pre-subunits. To finish the translation, a termination codon has to be read, which can be UGA, UAG or UAA.

To revise the model to show transcription to form mRNA, the research should identify the promoter and the stop signal. The promoter is a DNA sequence required to turn a gene on or off. The transcription process starts at the promoter which is usually located near the beginning of a gene and has a binding site for the enzyme that is used to make a messenger RNA (mRNA) molecule. The enzyme RNA polymerase will keep doing the transcription until it reaches a sequence of DNA that is signal which indicates it should stop. This process is called termination, and it happens once the enzyme reaches this sequence, called terminator.

8 0
3 years ago
Which of the following statements might someone use to most support a decision to buy organic produce?
IrinaVladis [17]

The use of chemicals on crops poses known health risks to humans. this statement most support a decision to buy organic produce.

  • The agriculture industry has become more industrialized, which has increased the chemical load on the environment.
  • Agrochemicals known as pesticides are applied to agricultural fields, public health initiatives, and urban green spaces to protect people and plants from numerous diseases.
  • Their side effects, however, can be a significant environmental health risk factor due to their proven capacity to have a wide range of detrimental health and environmental impacts.
  • Produce that is organic uses fewer pesticides.
  • Because organic food lacks preservatives that extend its shelf life, it is frequently fresher.
  • Organic farming typically benefits the environment.
  • Animals kept organically are not fed animal byproducts, growth hormones, or antibiotics.

learn more about  organic produce here: brainly.com/question/14318031

#SPJ1

5 0
1 year ago
Does the ANIMAL CELL have a CHLOROPLAST?<br> A. Yes<br> B. No
grin007 [14]
The answer is B: no
Hope this helps!
3 0
3 years ago
Select all that apply
Mekhanik [1.2K]
The answer is, "Lithosphere plate boundaries."

Most earth quakes occur in the upper 10-12 miles of the earth crust as the result of failure on faults caused by the strains induced by plate motions.

I hope this helps!
8 0
3 years ago
Read 2 more answers
A dog has recently obtained a fresh superficial linear wound after lacerating its flank on a fence. within what time period can
Andrew [12]

8 hours is the answer

3 0
3 years ago
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